A plane polarized light with intensity I...

A plane polarized light with intensity `I_(0)` is incident on a polaroid with Electric Field vector making an angle of `60^(@)` with transmission axis of polaroid. The intensity of the resulting light will be

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Using Malus law we have `theta=60^@`
`l=l_0 cos^2 theta`
`l=l_0 cos^2 60^@=l_0/4`

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